MODEL PRACTICAL EXAM QUESTION PAPER 2017-18

XI STD - CHEMISTRY PRACTICALS - QUESTIONS

I. PREPARATION OF COMPOUNDS: ( ANY ONE PER BATCH) / Marks : 2
1. / Explain the experimental procedure for the Preparation of aspirin from salicylic acid.
2. / Explain the experimental procedure for the Preparation of Iodoform from Acetone or Ethanol.
3. / Explain the experimental procedure for the Preparation of pure crystals of Tetraamminecopper (II) sulphate.
II. VOLUMETRIC ANALYSIS: ( ANY ONE PER BATCH) / Marks : 7
1. / Estimate the Normality of given Sodium Hydroxide (unknown NaOH) solution. You are provided with a standard Sodium Hydroxide (standard NaOH) solution of normality 0.0978 N and approximately Decinormal solution of Hydrochloric acid (HCl as link solution).
2. / Compare the Normalities of two given sodium carbonate solutions (A & B), then calculate the amount of sodium carbonate dissolved in 500ml of the weaker solution. You are provided with a Decinormal hydrochloric acid (HCl) solution as link solution.
II. SYSTAMATIC ANALYSIS OF SIMPLE SALT : ( ANY ONE PER STUDENT) / Marks : 6
1. / Zinc Sulphate - ZnSO4
2. / Ammonium Chloride – NH4CL
3. / Calcium Carborate CaCO3

MARKS DISTRIBUTION

VOLUMETRIC ANALYSIS / SALT ANALYSIS
Item / Marks / Item / Marks
Simple procedure: / Action of heat / Any four tests (necessary tests)
4 X ½ = 2
Pipette solution / ½ / Flame test
Burette solution / ½ / Action of dil HCl
Indicator / ½ / Copper turnings test
End point / ½ / Chromyl chloride test
(Titration –I ) / Preparation of Sodium carbonate extract / 1
Tabular column / ½ / Confirmatory test for acid radical / 1
Readings / 1 ½ / Group separation / 1
calculation / ½ / Confirmatory test for basic radical / 1
(Titration –II ) / A mere result / ( ½ + ½ )
Tabular column / ½ / TOTAL / 06
Readings / 1 ½
calculation / ½
TOTAL / 07

XI tF¥ò–ntÂæašbrŒKiw¤ nj®ÎfŸ–édh¡fŸ

I. nr®k§fisjahu¤jš: ( ANY ONE PER BATCH) / kÂ¥bg© : 2
1. / rhèÁè¡ mäy¤ÂèUªJM°gç‹ jahç¡F« MŒtfbrŒKiwiaés¡Ff.
2. / v¤jdhšmšyJmÁ£nlhåèUªJmnahnlh~gh®« jahç¡F« MŒtfbrŒKiwiaés¡Ff.
3. / öabl£uhm«ik‹fh¥g® (II) ršng£ gof§fŸjahç¡F« MŒtfbrŒKiwiaés¡Ff.
II. gUkd¿ gF¥ghŒÎ: ( ANY ONE PER BATCH) / kÂ¥bg© : 7
1. / bfhL¡f¥g£LŸsÂw‹ bjçahjnrhoa« iA£uh¡irLfiurè‹Âw‹fh©f. Ïj‰bfd0.0978 NÂwDŸsnrhoa« iA£uh¡i[L fiurY« ( £lNaOH ) , Vw¡FiwablÁeh®kšÂwDilaiA£nuhFnshç¡ mäyfiurY« (HClÏiz¥òfiurš) bfhL¡f¥g£LŸsJ.
2. / bfhL¡f¥g£LŸsÏu©Lnrhoa« fh®gnd£ fiuršfë‹ (A & B) Âw‹fisx¥Ã£LÂw‹ Fiwªjfiurèš500ä.èæšfiuªJŸsnrhoa« fh®gnd£o‹ viliafz¡»L. Ïj‰bfdblÁeh®kšiA£nuhFnshu¡ mäy (HCl)Ïiz¥òfiuryhfbfhL¡f¥g£LŸsJ.
II. vëac¥Ã‹ KiwahdgF¥ghŒÎ: ( ANY ONE PER STUDENT) / kÂ¥bg© : 6
1. / í§¡ ršng£
2. / m«nkhåa« FnshiuL
3. / fhšÁa« fh®gnd£

kÂ¥bg© g§ÑL

gUk‹¿ gF¥ghŒÎ / vëac¥Ã‹ KiwahdgF¥ghŒÎ
tif / kÂ¥bg© / tif / kÂ¥bg©
RW¡fbrŒKiw: / bt¥g¤Â‹ éisÎ / VnjD« eh‹FnjitahdnrhjidfŸ
4 X ½ = 2
Ã¥bg£ fiurš / ½ / Rl® nrhjid
ÃÍbu£ fiurš / ½ / Ú®¤j HClcl‹ éid
ãw§fh£o / ½ / jhäuJUtšnrhjid
KoÎãiy / ½ / FnuhikšFnshiuLnrhjid
(ju«gh®¤jš –I ) / nrhoa« fh®gnd£ rhWjahç¤jš / 1
m£ltiz / ½ / mäy_ycWÂnrhjid / 1
msÅLfŸ / 1 ½ / bjhFÂ¥Ãç¥ò / 1
fz¡ÑL / ½ / fhu_ycWÂnrhjid / 1
(ju«gh®¤jš –II) / KoÎk£L« vGÂæUªjhš / ( ½ + ½ )
m£ltiz / ½ / bkh¤j« / 06
msÅLfŸ / 1 ½
fz¡ÑL / ½
bkh¤j« / 07

HIGHER SECONDARY FIRST YEAR PRACTICAL EXAM – FEB -2018

SUBJECT : CHEMISTRY TIME : 2.30 HRS

DATE : .02. 2018 MARKS : 15

MODEL QUESTION PAPER

1. / Explain the experimental procedure for the Preparation of Iodoform from Acetone or Ethanol. / (2 MARKS)
2. / Estimate the Normality of given Sodium Hydroxide (unknown NaOH) solution. You are provided with a standard Sodium Hydroxide (standard NaOH) solution of normality 0.0978 N and approximately Decinormal solution of Hydrochloric acid (HCl as link solution). / (7 MARKS)
3. / Analyse the given simple salt systematically and report acid and basic radicals present in it. Record the procedure. / ( 6 MARKS )

Marks Allotment for XI STD Chemistry Practical

External assessment: Internal assessment:

Preparation of a compound : 2 marks Record : 3 marks

Volumetric analysis : 7 marks lab attendance : 2 marks

Salt analysis : 6 marks